./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/for_bounded_loop1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f90afc-5a3f-45d9-8c24-2c4c940b785f/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f90afc-5a3f-45d9-8c24-2c4c940b785f/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f90afc-5a3f-45d9-8c24-2c4c940b785f/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f90afc-5a3f-45d9-8c24-2c4c940b785f/bin/utaipan-SDwSMHVbGG/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/for_bounded_loop1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f90afc-5a3f-45d9-8c24-2c4c940b785f/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f90afc-5a3f-45d9-8c24-2c4c940b785f/bin/utaipan-SDwSMHVbGG --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d362508cc6d10100af1abe34073a764b50319c9e1ae9c7cc9c70a242e3f5c8c4 ............................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 05:17:51,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 05:17:51,825 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 05:17:51,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 05:17:51,866 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 05:17:51,868 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 05:17:51,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 05:17:51,873 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 05:17:51,876 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 05:17:51,878 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 05:17:51,879 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 05:17:51,881 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 05:17:51,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 05:17:51,884 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 05:17:51,886 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 05:17:51,888 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 05:17:51,889 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 05:17:51,891 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 05:17:51,894 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 05:17:51,897 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 05:17:51,900 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 05:17:51,902 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 05:17:51,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 05:17:51,905 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 05:17:51,910 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 05:17:51,911 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 05:17:51,911 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 05:17:51,913 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 05:17:51,914 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 05:17:51,915 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 05:17:51,916 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 05:17:51,917 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 05:17:51,918 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 05:17:51,919 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 05:17:51,921 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 05:17:51,922 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 05:17:51,923 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 05:17:51,923 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 05:17:51,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 05:17:51,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 05:17:51,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 05:17:51,928 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f90afc-5a3f-45d9-8c24-2c4c940b785f/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-29 05:17:51,960 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 05:17:51,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 05:17:51,962 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 05:17:51,963 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 05:17:51,963 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 05:17:51,964 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 05:17:51,964 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-29 05:17:51,965 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 05:17:51,965 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 05:17:51,966 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-29 05:17:51,966 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-29 05:17:51,967 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 05:17:51,967 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-29 05:17:51,968 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-29 05:17:51,968 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-29 05:17:51,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 05:17:51,970 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 05:17:51,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 05:17:51,971 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 05:17:51,971 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 05:17:51,972 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 05:17:51,972 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 05:17:51,973 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 05:17:51,973 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 05:17:51,974 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 05:17:51,974 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 05:17:51,975 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 05:17:51,975 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 05:17:51,976 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 05:17:51,976 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 05:17:51,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:17:51,977 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 05:17:51,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 05:17:51,978 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 05:17:51,979 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-29 05:17:51,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 05:17:51,980 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 05:17:51,981 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 05:17:51,981 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 05:17:51,981 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f90afc-5a3f-45d9-8c24-2c4c940b785f/bin/utaipan-SDwSMHVbGG/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f90afc-5a3f-45d9-8c24-2c4c940b785f/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d362508cc6d10100af1abe34073a764b50319c9e1ae9c7cc9c70a242e3f5c8c4 [2021-10-29 05:17:52,354 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 05:17:52,383 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 05:17:52,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 05:17:52,395 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 05:17:52,396 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 05:17:52,397 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f90afc-5a3f-45d9-8c24-2c4c940b785f/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/loops/for_bounded_loop1.c [2021-10-29 05:17:52,509 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f90afc-5a3f-45d9-8c24-2c4c940b785f/bin/utaipan-SDwSMHVbGG/data/eb3352022/4ff31a9185624a1da375160940b8a616/FLAG7fe443326 [2021-10-29 05:17:53,000 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 05:17:53,002 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f90afc-5a3f-45d9-8c24-2c4c940b785f/sv-benchmarks/c/loops/for_bounded_loop1.c [2021-10-29 05:17:53,015 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f90afc-5a3f-45d9-8c24-2c4c940b785f/bin/utaipan-SDwSMHVbGG/data/eb3352022/4ff31a9185624a1da375160940b8a616/FLAG7fe443326 [2021-10-29 05:17:53,366 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f90afc-5a3f-45d9-8c24-2c4c940b785f/bin/utaipan-SDwSMHVbGG/data/eb3352022/4ff31a9185624a1da375160940b8a616 [2021-10-29 05:17:53,369 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 05:17:53,371 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 05:17:53,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 05:17:53,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 05:17:53,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 05:17:53,386 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:17:53" (1/1) ... [2021-10-29 05:17:53,389 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41c10a60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:17:53, skipping insertion in model container [2021-10-29 05:17:53,390 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:17:53" (1/1) ... [2021-10-29 05:17:53,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 05:17:53,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:17:53,608 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f90afc-5a3f-45d9-8c24-2c4c940b785f/sv-benchmarks/c/loops/for_bounded_loop1.c[416,429] [2021-10-29 05:17:53,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:17:53,640 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 05:17:53,654 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f90afc-5a3f-45d9-8c24-2c4c940b785f/sv-benchmarks/c/loops/for_bounded_loop1.c[416,429] [2021-10-29 05:17:53,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:17:53,676 INFO L208 MainTranslator]: Completed translation [2021-10-29 05:17:53,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:17:53 WrapperNode [2021-10-29 05:17:53,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 05:17:53,679 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 05:17:53,679 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 05:17:53,680 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 05:17:53,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:17:53" (1/1) ... [2021-10-29 05:17:53,698 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:17:53" (1/1) ... [2021-10-29 05:17:53,722 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 05:17:53,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 05:17:53,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 05:17:53,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 05:17:53,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:17:53" (1/1) ... [2021-10-29 05:17:53,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:17:53" (1/1) ... [2021-10-29 05:17:53,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:17:53" (1/1) ... [2021-10-29 05:17:53,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:17:53" (1/1) ... [2021-10-29 05:17:53,740 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:17:53" (1/1) ... [2021-10-29 05:17:53,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:17:53" (1/1) ... [2021-10-29 05:17:53,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:17:53" (1/1) ... [2021-10-29 05:17:53,749 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 05:17:53,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 05:17:53,750 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 05:17:53,751 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 05:17:53,752 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:17:53" (1/1) ... [2021-10-29 05:17:53,761 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:17:53,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f90afc-5a3f-45d9-8c24-2c4c940b785f/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:17:53,803 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f90afc-5a3f-45d9-8c24-2c4c940b785f/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 05:17:53,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f90afc-5a3f-45d9-8c24-2c4c940b785f/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 05:17:53,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-29 05:17:53,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 05:17:53,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 05:17:53,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 05:17:54,231 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 05:17:54,232 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-29 05:17:54,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:17:54 BoogieIcfgContainer [2021-10-29 05:17:54,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 05:17:54,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 05:17:54,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 05:17:54,250 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 05:17:54,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 05:17:53" (1/3) ... [2021-10-29 05:17:54,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ae9f1ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:17:54, skipping insertion in model container [2021-10-29 05:17:54,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:17:53" (2/3) ... [2021-10-29 05:17:54,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ae9f1ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:17:54, skipping insertion in model container [2021-10-29 05:17:54,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:17:54" (3/3) ... [2021-10-29 05:17:54,253 INFO L111 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2021-10-29 05:17:54,259 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 05:17:54,260 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-29 05:17:54,315 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 05:17:54,327 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-29 05:17:54,328 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-29 05:17:54,347 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:17:54,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-29 05:17:54,354 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:17:54,355 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-29 05:17:54,356 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:17:54,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:17:54,383 INFO L85 PathProgramCache]: Analyzing trace with hash 85235575, now seen corresponding path program 1 times [2021-10-29 05:17:54,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:17:54,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568928466] [2021-10-29 05:17:54,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:17:54,400 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:17:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:17:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:17:54,717 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:17:54,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568928466] [2021-10-29 05:17:54,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568928466] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:17:54,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:17:54,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 05:17:54,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328086631] [2021-10-29 05:17:54,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:17:54,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:17:54,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:17:54,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:17:54,762 INFO L87 Difference]: Start difference. First operand has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:17:54,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:17:54,824 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2021-10-29 05:17:54,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:17:54,826 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-29 05:17:54,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:17:54,838 INFO L225 Difference]: With dead ends: 44 [2021-10-29 05:17:54,838 INFO L226 Difference]: Without dead ends: 25 [2021-10-29 05:17:54,843 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:17:54,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-29 05:17:54,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 16. [2021-10-29 05:17:54,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:17:54,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-10-29 05:17:54,887 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 5 [2021-10-29 05:17:54,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:17:54,888 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-10-29 05:17:54,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:17:54,889 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-10-29 05:17:54,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-29 05:17:54,889 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:17:54,890 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-29 05:17:54,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-29 05:17:54,890 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:17:54,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:17:54,895 INFO L85 PathProgramCache]: Analyzing trace with hash 85187462, now seen corresponding path program 1 times [2021-10-29 05:17:54,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:17:54,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420109269] [2021-10-29 05:17:54,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:17:54,896 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:17:54,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:17:55,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:17:55,029 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:17:55,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420109269] [2021-10-29 05:17:55,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420109269] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:17:55,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:17:55,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 05:17:55,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185975223] [2021-10-29 05:17:55,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:17:55,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:17:55,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:17:55,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:17:55,035 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:17:55,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:17:55,087 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-10-29 05:17:55,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-29 05:17:55,089 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-29 05:17:55,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:17:55,090 INFO L225 Difference]: With dead ends: 20 [2021-10-29 05:17:55,090 INFO L226 Difference]: Without dead ends: 18 [2021-10-29 05:17:55,091 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:17:55,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-29 05:17:55,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-10-29 05:17:55,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 16 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:17:55,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-10-29 05:17:55,096 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 5 [2021-10-29 05:17:55,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:17:55,096 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-10-29 05:17:55,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:17:55,097 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-10-29 05:17:55,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-29 05:17:55,098 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:17:55,098 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:17:55,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-29 05:17:55,098 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:17:55,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:17:55,099 INFO L85 PathProgramCache]: Analyzing trace with hash -501164262, now seen corresponding path program 1 times [2021-10-29 05:17:55,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:17:55,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984548143] [2021-10-29 05:17:55,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:17:55,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:17:55,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:17:55,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:17:55,338 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:17:55,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984548143] [2021-10-29 05:17:55,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984548143] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:17:55,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:17:55,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-29 05:17:55,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192854622] [2021-10-29 05:17:55,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-29 05:17:55,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:17:55,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-29 05:17:55,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-29 05:17:55,342 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:17:55,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:17:55,417 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2021-10-29 05:17:55,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-29 05:17:55,417 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-29 05:17:55,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:17:55,418 INFO L225 Difference]: With dead ends: 27 [2021-10-29 05:17:55,419 INFO L226 Difference]: Without dead ends: 25 [2021-10-29 05:17:55,419 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:17:55,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-29 05:17:55,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2021-10-29 05:17:55,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:17:55,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-10-29 05:17:55,426 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 8 [2021-10-29 05:17:55,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:17:55,427 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-10-29 05:17:55,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:17:55,427 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-10-29 05:17:55,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-29 05:17:55,428 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:17:55,428 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:17:55,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-29 05:17:55,429 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:17:55,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:17:55,430 INFO L85 PathProgramCache]: Analyzing trace with hash -873319098, now seen corresponding path program 1 times [2021-10-29 05:17:55,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:17:55,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552744279] [2021-10-29 05:17:55,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:17:55,431 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:17:55,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:17:55,453 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 05:17:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:17:55,513 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-29 05:17:55,532 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-29 05:17:55,534 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:17:55,536 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:17:55,537 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:17:55,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-29 05:17:55,541 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-10-29 05:17:55,545 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 05:17:55,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 05:17:55 BoogieIcfgContainer [2021-10-29 05:17:55,570 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 05:17:55,571 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 05:17:55,571 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 05:17:55,571 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 05:17:55,572 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:17:54" (3/4) ... [2021-10-29 05:17:55,574 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-29 05:17:55,623 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f90afc-5a3f-45d9-8c24-2c4c940b785f/bin/utaipan-SDwSMHVbGG/witness.graphml [2021-10-29 05:17:55,624 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 05:17:55,626 INFO L168 Benchmark]: Toolchain (without parser) took 2253.50 ms. Allocated memory was 107.0 MB in the beginning and 148.9 MB in the end (delta: 41.9 MB). Free memory was 69.2 MB in the beginning and 112.1 MB in the end (delta: -42.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:17:55,626 INFO L168 Benchmark]: CDTParser took 1.21 ms. Allocated memory is still 107.0 MB. Free memory is still 85.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:17:55,627 INFO L168 Benchmark]: CACSL2BoogieTranslator took 298.14 ms. Allocated memory is still 107.0 MB. Free memory was 69.0 MB in the beginning and 82.3 MB in the end (delta: -13.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-29 05:17:55,628 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.19 ms. Allocated memory is still 107.0 MB. Free memory was 82.3 MB in the beginning and 80.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:17:55,629 INFO L168 Benchmark]: Boogie Preprocessor took 26.34 ms. Allocated memory is still 107.0 MB. Free memory was 80.7 MB in the beginning and 79.8 MB in the end (delta: 897.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:17:55,630 INFO L168 Benchmark]: RCFGBuilder took 484.80 ms. Allocated memory is still 107.0 MB. Free memory was 79.8 MB in the beginning and 69.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-29 05:17:55,631 INFO L168 Benchmark]: TraceAbstraction took 1333.70 ms. Allocated memory was 107.0 MB in the beginning and 148.9 MB in the end (delta: 41.9 MB). Free memory was 68.5 MB in the beginning and 114.1 MB in the end (delta: -45.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:17:55,632 INFO L168 Benchmark]: Witness Printer took 52.80 ms. Allocated memory is still 148.9 MB. Free memory was 114.1 MB in the beginning and 112.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:17:55,637 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.21 ms. Allocated memory is still 107.0 MB. Free memory is still 85.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 298.14 ms. Allocated memory is still 107.0 MB. Free memory was 69.0 MB in the beginning and 82.3 MB in the end (delta: -13.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.19 ms. Allocated memory is still 107.0 MB. Free memory was 82.3 MB in the beginning and 80.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.34 ms. Allocated memory is still 107.0 MB. Free memory was 80.7 MB in the beginning and 79.8 MB in the end (delta: 897.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 484.80 ms. Allocated memory is still 107.0 MB. Free memory was 79.8 MB in the beginning and 69.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1333.70 ms. Allocated memory was 107.0 MB in the beginning and 148.9 MB in the end (delta: 41.9 MB). Free memory was 68.5 MB in the beginning and 114.1 MB in the end (delta: -45.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 52.80 ms. Allocated memory is still 148.9 MB. Free memory was 114.1 MB in the beginning and 112.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 11]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int i=0, x=0, y=0; [L20] int n=__VERIFIER_nondet_int(); [L21] COND FALSE !(!(n>0)) [L22] i=0 [L22] COND TRUE i